I wouldn't dismiss lessons from Australia. It has slightly higher electricity consumption than Spain (273 vs 265TWh/annually [1].) And there are limited interconnections to France [2]:

> That problem may not have been entirely Spain’s fault, El País said. “Interconnections with the rest of the continent continue to be much fewer than the European Commission recommends, not because Spain isn’t interested, but because France has for years resisted expanding them.”

[1] https://en.wikipedia.org/wiki/List_of_countries_by_electrici...

[2] https://www.theenergymix.com/massive-blackout-in-spain-shows...